Topeak Fuel Tank Top Tube Mounted Bag 

Large capacity top tube bag with easy-to-use velcro mounting system. 

Convenient top tube mount keeps contents close at hand.

Perfect for storing mobile phone, energy bars, wallet or tools.

Features-

1800 Denier Nylon/PVC Sponge

Nylon Straps

Medium : One main compartment with one inner mesh pocket

Large : Divided main compartment and two inner mesh pockets.

Cable access hole for charging devices with mobile power pack

Medium: 17.5x7.5x11cm, 0.5L, 120g

Large: 24x7.5x11cm, 0.5L, 120g

Note: Sand, dirt, mud, etc., and bags that are incorrectly pack may cause the bike frame paint in contact areas become dull or scratched over time. To avoid any potential damage, you should protect the frame or rack with foam covering or protective film before attaching bags or panniers.